Boehmitic Aluminas and High-Temperature Stable, High-Porosity, Pure-Phase Aluminium Oxides Obtained Therefrom

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm, is larger than the measured crystallite size determined on the 120 reflex reduced by 0.5 nm, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm, is larger than the crystallite size determined on the 120 reflex in nm, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm, is larger than the measured crystallite size determined on the 120 reflex reduced by 0.5 nm, wherein the crystallite size determined on the 020 reflex is from 6 to 50 nm and wherein the boehmitic alumina, comprises greater than 99 atomic % of hydrogen, aluminum and oxygen atoms, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm is larger than the measured crystallite size determined on the 120 reflex reduced by 0.5 nm, said alumina consisting essentially of greater than 99 atomic % of hydrogen, alumina and oxygen atoms, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm is larger than the crystallite size determined on the 120 reflex in nm, said alumina consisting essentially of greater than 99 atomic % of hydrogen, aluminum and oxygen atoms, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm, is larger than the measured crystallite size determined on the 120 reflex reduced by 0.5 nm, wherein the crystallite size determined on the 020 reflex is from 6 to 50 nm and wherein the boehmitic alumina, consists essentially of greater than 99 atomic % of hydrogen, aluminum and oxygen atoms, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm is larger than the measured crystallite size determined on the 120 reflex reduced by 0.5 nm, and the crystallite size determined on the 020 reflex is from 6 to 50 nm, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm is larger than the crystallite size determined on the 120 reflex in nm, and the crystallite size determined on the 020 reflex is from 6 to 50 nm, said alumina being convertible to a pure phase aluminum oxide by calcination.

Crystalline boehmitic alumina or pseudo boehmitic alumina having a crystallite size that, determined on the 020 reflex in nm, is larger than the measured crystallite size determined on the 120 reflex reduced by 1.5 nm and comprising metallic or non-metallic oxides or oxide hydrates of zirconium, titanium, lanthanum, and/or boron and mixtures thereof.